Max-Flow Thermal Fluid Heater (TFH) and High Temperature Hot Water (HTHW) generators are available for most applications ranging from 20-200 MMBTU/hr. They incorporate a fluid-cooled membrane wall construction for the furnace and heating coil enclosure, creating a highly efficient, shop-assembled package. They can be fitted with a register burner or designed to recover heat from turbine exhaust and supplemented with a duct burner, up to 2,800˚F. This is a highly-efficient forced circulation design that will last for years to come.